diff --git a/include/wx/propgrid/propgrid.h b/include/wx/propgrid/propgrid.h
index 7bcba570a7..43761102a6 100644
--- a/include/wx/propgrid/propgrid.h
+++ b/include/wx/propgrid/propgrid.h
@@ -389,7 +389,8 @@ public:
     /**
         Set current failure message.
     */
-    void SetFailureMessage(const wxString& message);
+    void SetFailureMessage(const wxString& message)
+        { m_failureMessage = message; }
 
 private:
     /** Value to be validated.